在网上差了一下才知道是_partition_large_extents参数导致的。从11.2.0.2开始,创建分区表,每个分区默认大小为8M,是由_partition_large_extents参数控制,可以算是11.2.0.2开始的一个新特性,为了减少extent数量,提高分区表性能,而设置的一个参数,默认为true,即分区表的每个extent为8M。测试一下: 确保deferred_segment_c...
11.2.0.2中引入了_partition_large_extents 的新特性,在extent size auto allocate的表空间上若创建分区表,则分区的initial extent size为8M。 试看下面的例子: _partition_large_extents TRUE Enables large extent allocation for partitioned tables _index_partition_large_extents FALSE Enables large extent allocatio...
11.2.0.2中引入了_partition_large_extents 的新特性,在extent size auto allocate的表空间上若创建分区表,则分区的initial extent size为8M。 试看下面的例子: _partition_large_extents TRUE Enables large extent allocation for partitioned tables _index_partition_large_extents FALSE Enables large extent allocatio...
_gc_fast_index_split_wait 0 _index_partition_large_extents FALSE _index_partition_shrink_opt TRUE _db_index_block_checking TRUE _disable_index_block_prefetching FALSE _index_scan_check_skip_corrupt FALSE _index_scan_check_stopkey FALSE _index_max_inc_trans_pct 20 _index_split_chk_cancel 5 ...
To rebuild a partition of a large clustered columnstore index, use ALTER INDEX REBUILD with the partition option. This example rebuilds partition 12. Starting with SQL Server 2016 (13.x), we recommend replacing REBUILD with REORGANIZE.SQL Copy ...
Ifaccelerated database recoveryis enabled, the separate logical and physical phases are used regardless of the number of extents. Use options with DROP INDEX You can set the following index options when you drop a clustered index:MAXDOP,ONLINE, andMOVE TO. ...
For small values of m, the cost of conducting comparisons dominates the total execution cost since the partitions at the bottom level m of the index have large extents and numerous intervals. As m increases, the fraction of the results collected from just accessing the contents of partitions ...
When you partition a non-unique, clustered index, the Database Engine by default adds the partitioning column to the list of clustered index keys, if it is not already specified. When partitioning a non-unique, nonclustered index, the Database Engine adds the partitioning column as a non-key...
partition maintenance operations, 9-31 use in backups, 28-23 user-defined types, 12-15 extended ROWID format, 10-12 extents allocating data blocks for, 2-11 allocation to rollback segments after segment creation, 2-21 at segment creation, 2-19 allocation, how performed, 2-11...
Large_page_alloc_pfs (ut::detail) Largest_lock_free_type_selector (temptable) Largest_lock_free_type_selector< T, typename std::enable_if< std::is_integral< T >::value >::type > (temptable) Largest_lock_free_type_selector< T, typename std::enable_if< std::is_pointer< T >::val...